Rotary pump



"'(Ne Model.)

K 2 Sheets-r-S'hP-et 1. B. P. TABPR. y

- ROTARY PUMP.

155.595,745. I' Patented Dee. 2,1, v159;?.

UNITED STATES PATENT OFFICE.

BENJAMIN F. TABER, OF BUFFALO, NEW YORK.

ROTARY PU M P.

SPECIFICATION forming part of Letters Patent No. 595,745, dated December21, 1897.

Application filed December 10, 1895. Serial No. 571,637. (No model.)

To all whom it may concern.'

Beit known that I, BENJAMIN F. TABER, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful Improvement in Rotary Pumps, of which thefollowing is a specification.

This invention relates to that class of rotary pumps which comprise,essentially, a hemispherical case or shell having an oblique head, aconical diaphragm mounted on the horizontal driving-shaft of the pumpand running with its conical face in contact with the plane innersurface of the oblique head, and a semicircular piston oscillating in adiametrical slot of the conical diaphragm and bearing with its planeedge against the oblique head of the case.

One of the objects of my invention is to provide the pump with efcientmeans for constantly keeping the oscillating piston and the conicaldiaphragm in snug contact with the oblique head of the case, so as totake up the wear of these parts automatically and prevent leakage of theliquid past the same.

The invention has the additional objects to so construct the pump thatits head can be removed for obtaining access to the interior thereofwithout disturbing other parts of the lpump and to render the pistonreadily removable from the conical head or diaphragm.

In the accompanying drawings, consisting of two sheets, Figure l is alongitudinal sectional elevation of a rotary pump embodying. Fig. 2 is asectional topl my improvements. plan view of the pump,l the plane of thesectional portion being in line 2 2, Fig; l. Fig.

3 is a transverse section 'in line 3 3, Fig. 1.

Fig.. 4 is a detached perspective view of the conical diaphragm and thedriving-shaft. Fig. 5 is a similar view of the coupling-sleeve.

Fig. 6 is a transverse section in line 6 6, Fig.

1, on an enlarged scale.

Like letters of reference refer to like parts in the several figures.

A represents the stationary frame of the pump, having standards A A2 atopposite ends thereof, and B is the hemispherical case 0r shellsupported on the front standard A' and preferably cast in one piecetherewith. The open front side of the case is formed with the usualinclined face or Iiange b, towhich is secured the oblique head C.

D D represent the inlet and discharge ports or passages arranged in theupper portion of the shell, on opposite sides thereof, and separated bya partition D2. These passages are preferably formed wholly in the case,and the branches or hollow enlargements D3, which form the same, areprovided with the usual flanges for the attachment of the pipes orconduits, which latter do not appear in the drawings.

E is the rotary conical head or diaphragm arranged within thehemispherical case and bearing with its conical face against theabutment formed by the upper portion of the 0blique head O in awell-known manner.

F is the horizontal driving-shaft upon which the conical diaphragm ismounted and which is supported at its front end in a bearing G, arrangedon the outer side of the oblique head O, while its rear portion passesthrough a stufling-box I-I, arranged on the rear side of the case. Theshaft extends rearwardly7 beyond this stufngbox,and its rear end issupported in a bearing I, arranged at the upper end of theframe-standard A2.

J J are tight and loose pulleys mounted side by side on the rear portionof the drivingshaft. The shaft is free to slide lengthwise in itsbearings to a limited extent.

' K is a spring arranged in the rear shaft-bearing I and exerting aconstant pressure against the rear end of the driving-shaft, therebyholding the conical diaphragm in yielding contact with the plane innerface of the oblique head O and insuring at all times a tight jointbetween these parts. The spring K is preferably interposed betweenwashers or followers la' k2, which bear, respectively, against the rearend of thedriving-shaft and the inner end of an adjusting-screw k3,arranged in a screw-threaded opening formed in the closed rear end ofthe bearing I. By means of this set-screw the tension of the spring maybe properly regulated. This spring serves not only to maintain a closejoint between the conical diaphragm and the oblique head 'and tocompensate for the wear of the diaphragm, but also permits the diaphragmto yield in case a hard object, such as a nail, enters be- IOO tween itand the oblique head, thereby preventing injury to the parts.

L is the oscillating piston or valve, which is arranged in a diametricalslot formed in the conical diaphragm in the customary manner. Thispiston is of the usual semicircular form and is pivoted at the middle ofits plane or straight edge upon a transverse pivot-pin Z, which iscarried by a longitudinally-sliding sleeve M, surrounding the frontportion of the driving-shaft, as shown iu Figs. l, 2, and 3. Thepivot-pin Z is preferably provided with a thimble or bushing Z. Theadjacent portion of the shaft is formed with a longitudinal slot Z2,through which the pivot-pin Z and its bushing pass.

n is a longitudinally-movable rod or bolt arranged in a socket or cavityn', formed in the outerportion of the driving-shaft and sliding in anopening` formed in the inner end of said socket. This bolt is secured atits inner end to a sliding block o, which moves in a longitudinal sloto', formed in the adjacent portion of the shaft and with which thesliding sleeve M is connected by a transverse pin o2, passing throughthe block and the sleeve, as shown in Fig. l, whereby the slidingmovement of the bolt is transmitted to the sleeve.

p is a spring surrounding the sliding bolt n, between the head of thelatter and the bottom of the socket n', and tending constantly to drawsaid bolt outwardly. This outward movement of the sliding bolt istransmitted through the block o to the coupling-sleeve M and through thelatter to the pivot Z of the oseillatin g piston, thereby drawing thestraight edge of the piston against the opposing plane face of theoblique head C and holding the piston in close contact with said head.The spring p thus compensates for any wear of the piston, wherebya tightjoint is always insured between the same and the oblique head and at thesame time permits the piston to yield in the event of any hard substanceentering between it and the oblique head, thus avoiding injury to theseparts. This construction also allows the diaphragm to recede from thehead ofthe ease for clearing obstructions without withdrawing the pistonfrom contact with the head, thereby preventing interruption of thesuction of the pump.

The coupling-sleeve M is provided in its inner portion with longitudinalslots m, as shown in Figs. l and 5, which permit the requisite play ofthe oscillating piston. The outer end of the front bearing G is closedby a stuffing-box or gland Q.

By arranging the spring of the piston on the outer side of the head ofthe pump-case and providing the bearing carried by the head with a glandor stuffing-box access can be conveniently had to the spring forrenewing it when worn out by simply removing the gland, thus avoidingthe necessity of removing the head of the case for this purpose.

R is a packing-block arranged in the lon gitudinal slot o' ot' thedriving-shaft and having a concave face r, which bears against a convexor semicircular knuckle fr', formed on the oscillating piston adjacentto its pivot-pin Z and projecting beyond the straight edge of thepiston. This packing-block is held in yielding contact with the knuckleof the piston by springs s, interposed between its rear side and theopposing front side of the slidingnblock o. The packing-block forms atight joint with the knuckle of the piston, which prevents leakage ofthe pumped liquid from the delivery to the receiving side of the caseand from the case into the outer or front shaftbearing.

In the operation of the pump the piston is oscillated in the conicaldiaphragm by the rotation of the latter and the contact of the straightedge of the piston with the oblique head of the case, which causes thewings of the piston to be alternately projected and retracted in awell-known manner.

By arranging the main portion of the driving-shaft F and the tight andloose pulleys J J on the rear side of the pump-case and forming theinlet and outlet branches of the pump wholly in th e case, as shown, theoblique head of the ease can be readily removed without disturbing theshaft and pulleys and the pipes connected with said bran ches. Thisconstruction also permits the removal of the piston from the conicaldiaphragm without removing the latter from the case, it being onlynecessary for this purpose to drive the pivot-pin Z of the piston out ofthe couplingsleeve M after removing the oblique head from the case, whenthe piston can be withdrawn from the slot of the diaphragm for repairingor renewing it.

The interior of the casing is preferably cut away from the lower ends ofthe inlet and outlet passages to the partition D2, as shown in Fig. 3,so as to aford an ample discharge for the liquid. The casing is cut awayin this manner adjacent to both passages, as these passages are usedinterchangeably-- that is, either as the inlet or the outlet of thepump.

I claim as my inventionl. In a rotary pump, the combination with ahemispherical case having an oblique head, and a conical diaphragmarranged in the case and carrying an oscillating piston, of a rotaryshaft carrying said diaphragm, at its front end and having its rear endjournaled in a bearing arranged in rear of said case and a springarranged in said bearing and operating against the rear end of saidshaft, substantially as set forth.

2. In a rotary pump, the combination with the hemispherical case havingan oblique head and the rotary conical diaphragm arranged in said caseand bearing with its conical surface against said head, of alongitudinally-inevable driving-shaft carrying said diaphragm, a springtending to force said shaft and diaphragln forwardly, an oscillatingpiston capable of sliding in said diaphragm toward and TOO lIO

from the oblique head of the case, and a spring which tends to move saidpiston against said oblique head, substantially as set forth.

3. In a rotary pump, the combination with a hemispherical case, of anoblique head closing the front end of the case and having on its outerside a bearing Which is provided at its outer end With a gland orstuffing-box, a

Irotary conical diaphragm arranged in the case case having an obliquehead and the rotary conical diaphragm arranged in the case, of

' an oscillating piston arranged in a slot or re-l cess of the diaphragmand capable of sliding in the diaphragm toward and from the oblique headof the case, a spring arranged in the front side of said oblique head,and a longitudinally-movable coupling connecting the pivot of theoscillating piston with said spring, substantially as set forth.

5. The combination with the hemispherical case having an oblique headand the rotary conical diaphragm arranged in the case, of an oscillatingpiston arranged in a slot or recess of the diaphragm and capable ofsliding in the diaphragm toward and from the oblique head of the case, asleeve carrying the pivot of said piston and capable of slidinglengthwise on the shaft of the diaphragm, and a spring-bolt sliding onsaid shaft and connected With said sleeve, substantially as set forth.

6. The combination with the hemispherical 4o.

case having an oblique head and the rotary conical diaphragm arranged inthe case, of an oscillating piston arranged in a slot or recess of thediaphragm and capable of sliding in the diaphragm toward and from theoblique head of the case, a sleeve carrying the pivot of said piston atits inner end and capable of sliding on the shaft of the diaphragm, ablock attached to the outer end of said sleeve, a sliding bolt arrangedin a socket in the outer 5o end of said shaft and connected with theblock of said sleeve, and a spring surrounding said sliding bolt betweenits head and the bottom of said socket, substantially as set forth.

7. The combination With the hemispherical 5 5 case having an obliquehead and the rotary conical diaphragm arranged in the case, of adriving-shaft carrying said diaphragm and provided on the front side ofthe diaphragm with a longitudinal slot, an oscillating piston 6oarranged in a recess of said diaphragm and provided on the front side ofits pivot With a convex knuckle, and a yielding packing-block arrangedin the slot of the driving-shaft and bearing against said knuckle,substantially as set forth.

Witness myhand this 18th day of November, 1895.

BENJAMIN F. TABER. Witnesses: v

KATHRYN ELMoRE, JNO. J. BONNER.

